998
FZUS63 KMKX 050753
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
253 AM CDT Sat Sep 5 2026

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan.

Waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.SYNOPSIS...

Light winds over Lake Michigan will shift east-northeasterly
early this morning as a cold front gradually slides southward.
Areas of fog may form over central and southern Lake Michigan
after the frontal passage, clearing out later this morning.

High pressure around 30.1 inches builds over the Great Lakes from
Ontario through the weekend, bringing modest northeast winds for
central and southern portions of Lake Michigan today. Winds
eventually weaken and become more light and variable for Sunday
and Monday as the high pressure system settles closer to the
region.

LMZ261-362-364-366-563-565-567-868-051515-
Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and north of a line from Charlevoix MI to South
Fox Island 5 NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to
Mid Lake-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to
Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
253 AM CDT Sat Sep 5 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...East winds 10 to 15 kt becoming northeast 10 to 20 kt.
Patchy dense fog this morning. Waves 1 to 3 ft.
.TONIGHT...Northeast winds 10 to 20 kt becoming east 10 to 15 kt
after midnight, then diminishing to 5 to 10 kt late. Waves 2 to
4 ft.
.SUNDAY...East winds 5 to 10 kt becoming northeast. Waves 1 to
3 ft subsiding to 1 to 2 ft.
.SUNDAY NIGHT...East winds 10 to 15 kt becoming southeast. Waves
1 to 2 ft.
.MONDAY...South winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 2 ft.
.MONDAY NIGHT...Southeast winds 5 to 10 kt increasing to 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Chance of
showers. Waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft.
.WEDNESDAY...Southwest gales to 35 kt becoming west. Waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-051515-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5 NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5 NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM
offshore to Mid Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid
Lake-
Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
253 AM CDT Sat Sep 5 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northeast winds 10 to 15 kt becoming north 10 to 20 kt.
Patchy dense fog this morning. Waves 1 to 3 ft.
.TONIGHT...North winds 10 to 20 kt becoming east 10 to 15 kt.
Waves 2 to 4 ft.
.SUNDAY...East winds 10 to 15 kt becoming northeast. Waves 2 to
4 ft subsiding to 1 to 2 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast.
Waves 1 to 3 ft.
.MONDAY...Southeast winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Waves
4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Southwest winds to 30 kt becoming west. Waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.

$$

LMZ761-051515-
MAFOR 0510/
MICHIGAN NORTH 12210 11110 13120 11210 11200. Waves 2 feet or
less today. Waves 1 to 3 feet tonight.

MICHIGAN SOUTH 13110 11120 11820 11120 12210. Waves 1 to 3 feet.

$$


Sheppard

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes